Window-scaffold.



A. P. LEADHOLM & C. J. EFRAIMSON.

WINDOW SCAFFOLD.

APPLICATION FILED JULY 17, 1914.

Patented June 1, 1915.

2 SHEETSSHEET I.

THE NORRIS PETERS 60.. PHOTO-LITHQ. WASHINGTON, u. u.

A. P. LEADHOLM & (1.]. EFRAIMSON.

WINDOW SCAFFOLD.

APPLICATION FILED JULY 17. 1914.

LML05 PatentedJune 1, 1915.

2 SHEETS SHEET 2.

THE NORRIS PETERS C PHOTO-LITHQ, WASHINGTON. D. c

ET TQEQ ANTON P. LEADHOLM AND CARL J. EFRAIMSON, 0F OMAHA, NEBRASKA.

WINDOW-SCAFFOLD.

menses.

Specification of Letters Patent.

Patented June 1, 1915.

Application filed July 17, 1914. Serial No. 851,560.

To allwhomit may concern: 7

Be it known that we,'ANToN P. LEAD- HOLM and CARL J. EFRAIMSON, citizens of the United States, residing at Omaha, in the county of Douglas and State of Nebraska, have invented new and useful Improvements in Window-scaffolds, of which the following is a specification.

This invention relates to window scaffolds for the use of artisans in working upon the outside ofa window frame orportions of a building adjacent thereto, the object of the invention being to provide a device of this character which may be folded when not in use, in close compass for storage or transportation, and set up for use in a ready and convenient manner so as to provide a stanch support.

A further,object of the invention is to provide a folding window scaffold which is also adjustable to suit different widths of window frames as well as different widths of window sills, and which when applied for use will be firmly fastened to the sill and supported from the body of the building so as to insure maximum safety to the workman.

The invention consists of the features of construction, combination and arrangement of parts herein fully described and claimed, reference being had to the accompanying drawings in which Figure l is a perspective view of a portion of a building showing the device arranged in position for use. Fig. 2 is a vertical longitudinal section through the device, illustrating the mode of fastening the same to the window sill and bracing the extended portion of the device in position. Fig. 3 is a bottom plan view of the platform in collapsed condition. Fig. l is a vertical transverse section through the same. Fig. 5 is a perspective view of one of the brackets and braces the sections of the bracket arm disassociated and the parts arranged in proper relative position. Fig. 6 is a detail section showing the mode of locking a folding brace in supporting position.

The device comprises a platform 1, preferably in the form of a grating composed of slats 2 suitably connected with longitudinal strips 3 and 4, said platform being composed of two sections 5 and 6 slidably connected with each other, whereby the platform may be adjusted as to width to suit any width of window frame within given limits, and also collapsed to a minimum width for convenience in storage or transportation. The sliding connections between the slatted platform sections may be of any suitable character, and if desired the parts of the platform sections may be made of Wood or metal, or of both, as desired.

The strips 4: connect the relatively outer end of the slats of the two platform sections 5 and 6 and constitute bracket arms, each of which is formed of metal and provided at its outer end with a downturned flange 7 and at its inner end with transverse rows of rack teeth 8 upon its upper face, at the center of the series of which rack teeth is a pole hole or perforation 9. The

toothed end 8 of the bracket arm or strip 4:

is adapted for interlocking adjustable engagement with a fastening bracket plate 10 having at its inner end a hook-shaped member 11 and at its outer end a longitudinal series of teeth 12 on its underside, and also formed at its said outer end with a longitudinal slot 13. The toothed end of the bracket member 10 is adapted to overlie the toothed end of the bracket member 4 and the teeth 8 and 12 interlock to adjust ably connect said bracket members to Vary the length of the bracket. When the bracket members are assembled, a bolt 13 passes upwardly through the pole 9 and slot 13 and holds the two portions in locking engagement, said bolt being provided with a clamping nut 14:. The two bracket members at the opposite sides of the platform may therefore be adjusted longitudinally for the application of the device to windows having sills which vary in width, as will be readily understood. The engaging hooks 11 are provided with clamping screws 15 to engage the window sill, as hereinafter described.

Hinged or pivoted to the under sides of the bracket strips 4: are braces 16, arranged at the outer sides of the platform sections, the pivotal connections 17 being of a character to permit said braces to fold inwardly over upon the under side of the platform, or to swing outwardly and downwardly to an operative position at right angles to the platform. Each brace comprises a long outer inclined arm 18, and a relatively shorter arm 19, said shorter arm having upper and lower parallel portions 20 and 21 connected by an offset portion 22. This olfset portion disposes the part 20 to bear upon the outer side of the brick wall of the build ing and the portion 21 to extend outwardly beyond and clear of the sill stone 23 of the window, by which a strong and durable construction of brace for the projecting portion of the platform is secured. The outer,

ends of the arms 18 of the braces 16 are pivoted to the flanges 7 at the outer ends of'the strips 4:, and said pivoted end of the arm and the flange 7 are provided with registering openings 9A for the passage of a locking pin or bolt 25 carried by a chain or like connection 26 fastened to the arm'l8, whereby the brace when disposed for use may be firmly locked in bracing position.

In the'use of the device, the inner end of the platform, is disposed to extend over the outer portion of the sill stone 23, while the bracket members 4 and 10 project inwardly over the sill board 27 and the hooks 11 are engaged with the inner projecting edges of said sill boards and secured thereto by clamping screws 15. It will be understood that in thus applying the device the platform sections are preliminarily adjusted to accord with the width'of the window, and the bracket arms and the braces 16 are then swung downward into bracing position to engage the outer surfaces of the brick wall below the window sill and locked in such position by means of the fastening pins 25, by which the projecting portion of the bracket, which extends outwardly beyond the sill stone, will be firmly sustained in position. The workman or artisan will thereupon be provided with a firm, stanch and durable support on which he may sit or stand while working upon the window 'frame, sashes or adjacent portions of the building structure. To release the bracket it is simply necessary to relax the nuts 14 sufiiciently to disengage the interlocking teeth of the bracket sections 4 and 10, whereupon the bracket sections 10 may be slid inwardly upon the loosening of the screws 15 to withdraw them from engagement with the sill board, whereupon the jack as a whole may be removed, the platform sections slid inwardly or collapsed and the braces folded to dispose the jack in a conveniently col- Oopies of this patent may be obtained I01 fivecents each, by aduressing the Commissioner of Patents, 7

lapsed condition for transportation or stor age. It will thus be seen that the invention provides a light, though strong, construction of scafiold which is not only adjustable to suit different sizes of windows but also to suit different widths of window sills, which when applied in position for use will be ing, means connected with the inner ends of i said bracket strips for securing the same to the projecting ledge of a window'sill and braces connected with the respective bracket strips and adapted to fold inwardly parallel with the underside of the platform and outwardly at right angles to said platform, each of said braces having a short vertical arm and a long inclined arm, saidlong inclined arm having its outer end bent to lie parallel with the downturned outer end of the cooperating bracket strip and pivoted thereto and provided with a fasteningopening to register with the fastening opening in said strip, and said short vertical arm having a lower'wall engaging portion,,an upper portion lying in rear of the vertical planeof said wall engaging portion and pivoted to the bracket strip and an intermediate offset holding said portions in the described relation, and a fastening member carried by the inclined arm of the brace and engageable' with. the openings in the bracket and brace to secure the brace in working position.

tures in presence of two witnesses.

ANTON. P. LEADHOLM.

CARL-J. EFRAIMSON.

- Witnesses: l V f NELSON A. LUNDGREN, GUST GARL'sON.

. Washington, D. 0.

-In testimony whereof we afiix our signa 

